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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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package com.oracle.truffle.llvm.parser.model.symbols.constants.integer;

import java.math.BigInteger;

import com.oracle.truffle.llvm.parser.LLVMParserRuntime;
import com.oracle.truffle.llvm.parser.model.SymbolImpl;
import com.oracle.truffle.llvm.parser.model.symbols.constants.AbstractConstant;
import com.oracle.truffle.llvm.parser.model.visitors.SymbolVisitor;
import com.oracle.truffle.llvm.runtime.CommonNodeFactory;
import com.oracle.truffle.llvm.runtime.GetStackSpaceFactory;
import com.oracle.truffle.llvm.runtime.datalayout.DataLayout;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.types.Type;
import com.oracle.truffle.llvm.runtime.types.Type.TypeOverflowException;

public final class BigIntegerConstant extends AbstractConstant {

    private final BigInteger value;

    public BigIntegerConstant(Type type, BigInteger value) {
        super(type);
        this.value = value;
    }

    @Override
    public void replace(SymbolImpl oldValue, SymbolImpl newValue) {
    }

    @Override
    public void accept(SymbolVisitor visitor) {
        visitor.visit(this);
    }

    public BigInteger getValue() {
        return value;
    }

    @Override
    public String toString() {
        try {
            if (getType().getBitSize() == 1) {
                return BigInteger.ZERO.equals(value) ? "false" : "true";
            }
        } catch (TypeOverflowException e) {
            // fall-through
        }
        return value.toString();
    }

    @Override
    public LLVMExpressionNode createNode(LLVMParserRuntime runtime, DataLayout dataLayout, GetStackSpaceFactory stackFactory) {
        try {
            Type type = getType();
            if (Long.compareUnsigned(type.getBitSize(), Long.SIZE) <= 0) {
                return CommonNodeFactory.createSimpleConstantNoArray(value.longValueExact(), type);
            } else {
                return CommonNodeFactory.createSimpleConstantNoArray(value, type);
            }
        } catch (TypeOverflowException e) {
            return Type.handleOverflowExpression(e);
        }
    }
}
